These fittings are used together with crimp or clamp (cinch) method for making a connection. Product description Efield: Full Range Pex Plumbing Supplier Efield USA Inc, specializing in pipes, brass fittings, ball valves and manifolds etc. Efield: Full Range Pex Plumbing Supplier 1 Pex Fittings 1/2 Pex Tee 45-Pack EFIELD 3/4" Poly (PPSU) Barb Crimp Pex Fitting Combo With Position Tab, Tees, Elbows, Couplings 15 PCS/each, ASTM F2159,( PPSU1807056-45PCS Pex A Fittings Poly PPSU Reducing Tee Pack of 5) EFIELD Pex 1" x3/4" x 3/4" Reducing Tee Crimp Barb Brass Fittings,(PEX1807088 They help you save time and effort by streamlining your work. 5 PCS 1 X1 X3/4 Reducing Tee Poly PPSU Barb Crimp Pex Fittings, Safe For Potable Water Stainless Steel PEX Fittings EFIELD 3/4 Inch PEX Stainless Steel Press Sleeves - Pack Of 100 For Brass & Poly Fittings Press Fittings About this item Directly from One of the Biggest Pex Systems Manufacturers 5 PCS 1 X1 X1 Tee Poly PPSU Barb Crimp Pex Fittings, Lead Free Made of Poly (PPSU), Better Performance than Brass Fittings in RO, Chlorinated Water Application Suits with all Types and Brands of Pex Tubing, ASTM F2159 NSF/ANSI 61 NSF 372 Certified Compatible with Stainless Steel Clamp & Copper Crimp Ring Systems Directly from One of the Biggest Pex Systems Manufacturers Suits with all Types and Brands of Pex Tubing, ASTM F2159 NSF/ANSI 61 NSF 372 Certified